Pressure dispensing device



March 27, 1951 G. H. woon ET A1. 546,808

PRESSURE DISPENSING DEVICE Filed March 22, 1947 2 Sheets-Sheet llllllllllllllmllrll' |l||||||l|| 'llllllll March 27, 1951 Filed March22, 1947 G. H. WOOD ETAL PRESSURE DISPENSING DEVICE 2 Sheets-Sheet 2:ynvewrs Patented Mar. 27, 1951 PRESSURE DISPENSING DEVICE Geoffrey H.Wood, Toronto, Ontario, Canada, and

Lawrence Thomas Ward, East Orange, N. J., assignors to PrelIncorporated, East Orange, N. J.,

a corporation Application March 22, 1947, Serial No. 736,538

l This invention relates to pressure dispensing devices, particularly todevices of the kind which are used to spray insecticides, germicides,bactericides, medicants, fumigants, deodorants, lubricants, paints,lacquers, and other chemicals, liquid gases, and suspensions of nelydivided solids.

The object of the invention is to vprovide a dis- 8 Claims.` (Cl.222-399) pensing device which is re-usable and a container for repellantgas and a material to be dispensed which is sufficiently cheap to make'that it can be disposed of after the material is exhausted.

Generally speaking, the object of the invention is attained by providinga complete package composed of a container holding the material to bedispensed and incorporated within such container a cylinder of gas underpressure, and a sprayer unit intoA which the container is placed.Incorporated in this sprayer unit is the necessary mechanism forreleasing the gas pressure and convenient means for dispensing andatomizing the material within the container.

The feature of the invention is that the material container may be madeof light weight material such as ordinary'tin plate, commonly used forcontaining materials to be shipped, which is cheap and easy to make andnot adapted to withstand heavy pressure. When this container is placedwithin the casing of the sprayer unit, which is of sufficiently strongconstructionv to withstand the gas pressure, the pressure is equalizedon all sides of the material container when applied thereto because itextends not only within the material container but between the outersides of the material container and the inner side of the casing of thesprayer unit. Another advantage of the construction is that it ispossible to use the dispensing unit for all kinds of materials, sincethe materials do not come in contact with the outer casing of thesprayer unit when dispensed, so that it is necessary only to make thematerial container of such .material as will not be affected by thematerial which it contains, or to coat the interior of the materialcontainer with a protective substance, and to make the dispensing tubeand passageway of material which is not subject to attack by such ma-vThus the device may be used for disamterial. pensing highly corrosivesubstances such as monium compounds. v

A further advantage obtained by the invention is that the dispensing ofthe material may be regulated, that is to say that once thegas .cyl--vinder is punctured it is not necessary that .the-

Whole of the material be dispensed at once, b ut the dispensing can becontrolled so that the material'can be discharged at such rate and insuch quantities and at such time as may be desired.

The' invention is hereinafter more particularly described and isillustrated by way of example in the accompanying drawings in which:

Figure 1 isar vertical cross section of the disposable materialcontainer with the propellant gas cylinder mounted therein;

Figure 2 is a vertical cross section through the sprayer unit as awhole;

Figure 3 is a vertical section of the sprayer unit as a whole; with thecover or head in side elevation; and shown partially removed from themain body or case of the sprayer unit;

Figure 4 is a top plan view of the sprayer unit partlyin section; and

Figure 5 is a fragmentary horizontal section on the line 5-5 in Fig. 2.

In the drawings corresponding numerals in the dilerent figures refer tocorresponding parts.

The inner material container l is preferablyr cylindrical in shape andconstructed of tin plate in accordance with the ordinary tin canmanufacturing methods and is shown as being partly full of a liquid 2which is the material to be dispensed. In the top of .the materialcontainer I is provided a weakened area rIa where the material isconsiderably reduced by forming so that it may be readily punctured by adischarge tube as here-y inafter described. Y

The propellant gas cylinder 3 may be of ordinary construction such asisused in other dispensing devices provided with the usual. milledpuncturable are-a 3a inthe upper end thereof.

An opening is provided in the top of the material container I providedWith a threaded neck 4. The gas propellant cylinder 3 extends throughthe opening into the material container I with its upper end containingthe puncturable area 3a located outside of the container. A flange orcollar 5 extends around the propellant gas cylyinder 3 adjacent itsupper endland is threaded so that it may be screwed over the threadedneck 4.l lA washer 6 preferably of compressible plastic or similarmaterial engages the'upper end of the neck 4 to form a gas-tightclosure. The {material container I will not bev of su'icientstrongconstruction towithstand the pressure of the gas contained in thecylinder'if such gas were discharged into the container at a time whenthe pressure surroundingy the container was atmospheric. Y

` Referring now toFigures and 3 it will be seen that the materialcontainer I is adapted to t in the outer casing 1 of the spraying unit,with' charge passageway 8a which extends from the.

interior to the exterior of the casing and is provided with valve meanshereinaftendscribedd.

Screwed into the head 8 and dependingrtherefrom and communicatingwitlrtliedischarge pase sage 8a is discharge tube I0having.abevelledlor. pointed lower end Illa adapted to pierce weakenedarea Ia of the material container I when the sprayer unit is assembled.

Slidably mounted in the central aperto-.seein the cover 8 is a rod IIhaving a piercing pin Ila depending from its-lo.wer.. end and adapted topierce the gas propellant' cylinder v3 tlirdugi its" punce turable area3a'.

A. coiledspring`l` IZ surrounds the` pin II" and engagesV a shoulder at'the top of the pin', and a shoulder in the coverJS" and tends' topushxtlie pin outwardly and disengage itfi'omthe cylinder screwedlto athreadedflange |61 onthe cover 8.

Interposed between 'a' shoulder ontliecap" I5" and' the upper end'cfvtheflang'e IIis a diaphragm f5 wl'ricl'r forms' a: gas-'tight seal4between theinterior of thesprayer unit and the exterior thereof. ThestemK I4* bears on the diaphragm; I5a and'A applies pressure to the topof the rocrt I'Ij depressing it whenv th'gwheel" I'3turns clockwiseand'7 permit.- tingit tor` be pushediout by'the'spring" I2 'when itturns anti-clockwise.

In assembling' the unit, theV material container I containing the' gaspropellant cylinderv 3` is placed withinv the casing. 7i Thecover isthen rais-edover'the casing I"y and the beveiled lower' piercing end ofthe'l discharge tube` 2' is forced tl'n'ough the weakened* puncturahlearea Ia of the-ma terial-container I'A as"illustrated"n' Fig: 3: The'cover isthenscrewed on to thefcasingr. Thev material container I isfreely rotatable inthe casingl T, and i by virtueA of Ytlie'iact that'the' discharge tube" I8 is" inserted:4 therein, will' rotate' with'the'cover` as tlr'ecover isP screw'eddown: The space between'u thedischarge tubeK l0 and" the' broken edges of thematerial containerrlissuf.- lcient to' p ermit: ingress oflga's'lo'ut normally notsufficient to permit thematerial within .the corrtainer to'ow outshould-the container'riot'lie*in4 upright position;

When the cover is' 'screwed ontightly,I the hand* wheel 'I3 may beturnedclockwise -topuncture `the propellant gas* cylinderY 3f asillustrated-in Fig. 3E Thisreleasesthefgas in thecy-Iinder :which passesout'intofthe-casingl; llsthe'space between the man-,erialv container Iand tnecasingT-and'enters' tne'top 1 of f the material container I gproviding` a pressurewhicn will l expeli or discharge` the i mate'-rialf within saidv container tl'h'oughl the` discharge` tube IU whichv`preferably :extends substantiallyto the bottom oftliecontain-erIi The'`pressuref ofthe gas outsidethe materia-l' container I counteracts thepressure of the gas- Whichz passes intothe'container at' point la; so

4. that despite the fact that the container I is of light weightrupturable material, it does not break. The pressure of the gas withinthe container I forces the material up through the discharge tube I0 andout through the discharge passageway 8a.

As shown inFigs. 2, Lland .discharge passagewazy 8e isfprovided with anenlarged portion near its outlet and forming a valve chamber to receivevalve head Il provided with a Valve face I'5L of rubber or other similarsuitable material adaptedftorfengage valve seat I8. In Fig. 2 the valve.isclosed, engaging the valve seat, and in Eig.v 5""it;.is open; out ofengagement with the valve seat.. valve head.' il. through the dischargepassageway to the outer end thereof. ExtendinglongitudinalIyvthrongf-li-tlreevalve stem is a passageway I9whichbranches off at right angles through the valve head I to theexterior thereof. There is a space between the sides of .the valve. headandthe sidesofthe valvechamber florthe passage of material from thevalve chamber tothe passageway I @when thevalvev isI open;

A sliidable' bearing 2 il* in rthe"enlarged portiono the passagewayVV8** engagesr the back'of the .valve head'. A= coil compression springsurrounding the valvestem I9 engages the slidable bearing andi a p'lugiwhich iscscrewed intotlieouter endl of the passageway 8a, and normallypresses the valve head to causeithevalve. face We to engage -valve seatI8x andL close; thev valve;

A valve cap*- 22 is screwedlto the end of' the valve-stem I9 and isprovided'with flanges 22a which enclose the end 0fthepassageway;` Valvecapr 22X isv soformedv as to vprov-ide anatomizhig nozzle;

T-'- open v the valve' there isprovided a'- pair'of push' rods`-'2'3 23which(slideinaperturesfthrough theheadfandeng-age the rearedge-offlanges 2221i- When'rod's; 23 arevmovedforwarcr they willlpush-the-headoutwardly thu-s; pull-ing the valve stem ISE-Sandopeningthe valve to cause the material torbedispersed; The votlrerendsjoi the push rods 2 3, 232 are engageable a manu*- allyoperabletrigger 2 4fpivotedto' the 1 underside of a pistol grip or handlethe-lower endiofi trigger 2&3 is mlledby-aA ngerfittpivots'so' that itsuppery vend engagesfpusr rod'se23", 23tfr move themforward"to'engage=valve-' cap'ZZ-Y: Whenthetriggerisfreleasedsprihg 25i'et'ra'cts'` valve cap 22 which retracts push rods 231523'.

It-'will -beobservved`v thattwh enithe'valve'scloset the `casing willbeseaiedby valvel'iead4- il; .gaskets Si; and diaphragm IT'so thatnogasor materal It is thought that the const'ructic'm..anl'lus'e.ofivtheV invention will be. apparentk from the' above'- description of thevarious'partsand. theii'pur pose; It is Ato lee-understood.thatthe'formof'our invention herewith shownzand described', .is toi be valve stem I9extends from the Y taken vas a preferred example of the same, and

that various changes in the shape, size, and arrangement of parts mayberesorted to, 'without departing .from the spirit of my invention or thescope of the subjoined claims. f

What we claim as our invention is:

1. In a pressure dispensing device, the combination of an outerpressure-resistant casing provided with a discharge passage extendingtherethrough, a non-pressure-Lresistant material container mountedWithin the casing, av propellant gas cylinder mounted in the materialcontainer and having a portion of the exterior thereof located outsidethe material container, said propellant gas cylinder being charged withgas at a pressure which would if containedl within the materialcontainer normally rupture same but which can be contained by thecasing, and the outside portion of the cylinder being provided with apuncturable area, means for puncturing the puncturable area of thecylinder and for puncturing the material container to'permit gas underpressure to enter the casing and the interior of the material container,and means connecting between the interior of the material container andthe discharge passage in the casing for dispensing the material in thecontainer.

2. In a pressure dispensing device, the combination orf-,an outer casinghaving a removable cover provided with a discharge passage extendingtherethrough, an inner puncturable material container,l a propellant gascylinder mounted in the material container and having a portion of theexterior thereof located outside the material containenlthe outsideportion being provided with a puncturable area, a discharge tubecommunicating with the discharge passage in the casing cover anddepending therefrom, its lower end being provided with piercing meansadapted to puncture the inner container, piercing means mounted on thecover and adapted to puncture the -puncturable area of the cylinder, andmeans for controlling the flow of material through the liquid dischargetube and passage.

3. In a pressure dispensing device, the combination of an outerpressure-resistant casing provided with a discharge passage extendingtherethrough, a non-pressure-resistant material container mounted withinthe casing, said container having a threaded opening therein, apropellant gas cylinder provided with a puncturable area and threadedmeans co-operating with the threaded opening in the container to supportthe cylinder in the container with the puncturable area outside thecontainer, said propellant gas cylinder being charged with gas yat apressure which would if contained Within the material container normallyrupture same but which can be contained by the casing, means forpuncturing the puncturable area ofthe cylinder and for puncturing thematerial container to permit gas under pressure to enter the casing andthe interior of the material container,'and means connecting between theinterior of the material container and the discharge passage in thecasing for dispensing the material in the container.

fi. In apressure dispensing device, the combination of an outer casinghavingy a removable cover provided with a discharge passage extendingtherethrough, an inner puncturable material container, a propellant gascylinder mounted in the material container and having-a portion of theexterior thereof located outside the material container, the outsideportion being provided with a puncturable area, a discharge tubecommunicating with the discharge passage in the casing cover anddepending therefrom, its lower end being provided with piercing meansadapted to puncture the inner container, piercing means mounted on thecover andladapted topuncture the puncturable area of the cylinder, saidmeans including a member having a piercing point, pressure applyingmeans outside. the cover for applying pressure on the piercing pointmember for forcing the piercing point against the Vpuncturable area ofthe cylinder, and a gas-tight diaphragm between the pressure applyingmeans and the piercing point member, and means for controlling the flowof material through the liquid discharge tube and passage.

5. In a pressure dispensing device, the combination of an outer casinghaving a removable cover provided with a discharge passage extendingtherethrough, an inner puncturable material container, a propellant gascylinder mounted in the material container and having a portion of theexterior thereof located outside the material container, the outsideportion being provided with a puncturable area, a discharge tubecommunicating with the discharge passage in the lcasing cover anddepending therefrom, its lower end being provided with piercing meansadapted to puncture the inner container, piercing means mounted on thecover andadapted topuncture the puncturable area of the cylinder, avalve in the discharge passage, and manually actuated means for openingand closing the valve to control the flow of material through saidpassage.

6. In a pressure dispensing device, the combination of a casingpro-vided with a discharge passage extending therethrough from theinterior to the exterior thereof, gas pressure means for dischargingmaterial from the interior of the casing through the discharge passageto the exterior of the casing, said discharge passage being providedwith an enlarged portion forming a valve chamber and a valve seat at theinner end thereof, a valve movable in the valve chamber to engage anddisengage the valve seat to close and open the passage, a valve stemextending from the low pressure side of the valve through the dischargepassage, said valve stem having a hole extending longitudinally thereofand opening at its inner end into the valve chamberand at its outer endintoI atmosphere, a valve cap secured to the outer end of the valve stemexteriorly of the casing, said valve cap having a central orificeregistering with the outer end of the longitudinal hole through whichmaterial from the interior of the casing may be ejected, and a shoulderextending beyond the sides of the valve stem, spring means normallyurging the valve stem inwardlyto cause the valve to engage the seat, andmanually actuated means operable to engage the shoulder of the valve capto move the valve stem outwardly to cause the valve to disengage theseat and open the discharge passage.

7. In a pressure dispensing device, the combination of a casing provided`with a discharge passage extending therethrough from the interior tothe exterior thereof, gas pressure means for discharging material fromthe interior of the casing through the discharge passage to the exteriorof the casinggsaid discharge passage being provided With an enlargedportion forming a Valve chamber and a valve seat at the inner endthereof, a valve movable in the Valve chamber to engage and disengagethe valve seat to close and open` the passage, a valve stem extendingfrom @mms 'the law pressuite:sidenorbhezvalvtrhroughgbhefdisQhagefpasaage, saldi Wallys-f. stem: having af. holeextendingrslongbudinallyf fbhereof: ian'dgfopening- 'at its/innenendiintorfnefvalve; rehamberfanda at its Onbekend into atmosphere; a;valve @anesecured to; zine outer :endl of; the .valvevstem exteriorly,.of the feasing, said nalvefeapihayingza centrali or''oeregisteringrwith. the-:Quterfend ofthelongitudinal hole: .through whichmaterial from thefl interior of :the easing: may; be: ejected; and avshoulder extending rbeyornd: theA sdesnfthe vali/estem. spring' means;normally urging. theA valve stem inwardly- Vto; oausefvzthewalve-f toengage; the: seal?, and manually actuated meansmoperaiole; to enrgagethe Shoulder offitheyalveeaptomoveihe vaiye stem` out,ward-lyY te'canse the` valve -v to disengage the lseatv and open;` the dischargepassage, said mani-lallyv actuated, means including a rodaslide abgly;mounted on; ther casing andi engageable `with thezsnoulder ofthe-valvecap.:

8, Ima pressure'dispensing. device', the combi,- nation of agcasngprovided.Wibhnadischarge'passage extending therebhroughzfromztheinteriorto the exterior thereof;` gas f pressure ,means for,discharging;y material iromrthe interior off the casing through thedischarge; passage t'o theY exterior of thercasing.; saiddischargeipassage; being-provided with; an: enlarged purtonnforming avalveY chamber-and1a vali/e seat-at: the inner endfthereof',

a@ valve; movable inv, the: valveF chamberfto en-A gageand disengage thevalue1.seatz'tcr,close` and open.y the passage, A ai vali/el stemextending-f from theA lowY pressure side: of theY valve; through thedisohargepassage; saith valve-z stem having-a holeextendinglongitudinally: thereof: and opening at 851 8- .its inner-:endiL-into; the; valve@ chamber@ arndriat. its outer; vend -ntolatmosphere, a'valve-'fcap-secured tothe; outer end of the valvex'sjsemeXteriorly-:ef the easing; :saidvalve -cap having a; fcentralzforaeregistering with theouter-end; ofiblre longitudinal hole throughfvs/hii'ilfxanali:erialzfroml theVy interior of RnRERENcE-s CITEDThefollowing referencesY are of recordV in the 4 fileA of" this patent:

UNITEQ. STATES Pfifrfewrs*v Number Name Date 599;389? Jackson "feb-` 22;1898 1,725,234' Wedeberglf-.- A'ug'f20, 1929 1','T57;68` HuttJune-24,"1'930 2i249g608` Green Julyfl; 1941 FOREIGN- PATENTS- Numtel:Country Date 485;-2'r81-y GreatBritain- Mayu-I7; 1938

